Improvement in lamps for burning rosin-oil



P. SARGENT.

Lamp.

Patented March 4, 1856.

M. MYERS. mmhmmogn lm, Washingkalll u c.

UNiTEn STATES PRENTICE SARGENT, OF NEIVBURYPORT, MASSACHUSETTS.

IMPROVEMENT IN LAMPS FOR BURNING ROSIN-OIL.

Specification forming part of Letters Patent No. 14,369, dated March 4, 1856.

T0 aZZ whom it may concern.-

Be it known that I, PRENTIOE SARGENT, of Newburyport, in the county of Essex and Stat e of Massachusetts, have invented a new and useful Portable Lamp for Burning Rosin-Oil; and I do hereby declare that the followingis a full and exact description thereof, reference being had to the accompanying drawings, making part of this specification Figure 1 being a vertical central section of the lamp; Fig. 2, view of the top thereof, the chimney being removed; Fig. 3, a horizontal section in the line a: :0, Fig. 1; Fig. 4, a horizontal section in the line 11 'y, Fig. 1; Fig. 5, view of a part detached.

Like letters designate corresponding parts in all the figures.

The nature of my invention has reference to improvements in regulating and controlling the inner and outer drafts, substantially as hereinafter set forth.

The tube I, which forms a continuation of the inner tube B of the oil-reservoir, is made detachable thereform, and is provided with a projecting rim at the bottom, which rests upon the upper end of the oil-reservoir A, being kept in place by projections j 7. Screws 1' t' secure in place the ring Z, which holds the chimney M firmly upon the lamp.

IVithin the tube I and connected therewith by arms h h is the outer wick-tube D. The tubes I and D, which compose the top of the lamp, are removable and turn round freely upon the top of the oil-reservoir. This arrangement enables me to readily trim and renew the wick E and to raise and lower it by simply turning the top around. The wick is raised and lowered by means of a slot 6, Figs. 1 and 5, reaching fromnear the bottom of the tube D to the top, in which a pin f, projecting from the wick-holderN, slides, so that on turning the removable top of the lamp said wickholder will be turned, and raised or lowered by moving in the screw-thread g on the periphery of the inner wick or draft tube G. Said tube G reaches to within a short distance of the top of the wick, and thence is extended to the usual height of the inner wick-tube by a tube II of somewhat larger diameter than itself, being screwed or otherwise secured thereon, so that it may be removed when desired, substantially as shown in Fig. 1. This tube II, being larger than the tube G, compresses the upper part a of the wick E into a narrower compass than the portion below and causes the lamp to burn better and to be more readily trimmed, while the uncompressed state of the lower part of the wick enables it to convey the oil upward by its capillary action as fast as ordinary wicks. The bar 8, which guides the supporting-rod of the button L, is attached to the stationary draft-tube G, so that thetube II may be removed to permit the insertion and withdrawal of the wick. Tubes d cl, Fig. 1, conduct the oil from the reservoir A into the wick-space c.

The outer draft is conducted and controlled by the following contrivances: It is first admitted through slotted openings m m or their equivalents just below the oil-reservoirA into an annular space T, substantially as shown in Fig. 1. Said space opens directly into the draft-tube B, the communication being partially closed,however,bya conical lip orledge 0, extending inward and downward into the space. The lower end of the annular drafttube B should be as wide as practicable and gradually narrow to the top.

Below the entry-space T is formed an annular inclosed air reservoir or chamber P, opening upward into said space T, the communication being also partially closed by a conical lip 19, extending inward and upward into said space. The effect of this air-reservoir, in connection with the arrangement of the entryspace T, draft-tube B, and projecting lips 0 p, is to render the draft nearly constant and unaffected by a sudden gust of air or movement of the lamp, the air within it being a sort of fountain which supplies a constant flow upward and being replenished by the more variable rush of air into it from without.

The inner draft is controlled and rendered constant in the following manner: A chamber S near the bottom of the lamp is entirely inclosed, and only communicates with the outer air through small apertures 17, n or their equivalents, such as narrow slots or the meshes of Wire-gauze. This tends very much to break the force of gusts of air coming against the lamp. WVithin the chamber S is located another chamber R, communicating with said outer chamber S only through narrow slots r 0', Figs. 1 and 4, by small holes, wire-gauze, or their equivalents. This inner chamber opens directly into the bottom of the inner drafttube G, or may, in fact, be only the lower end thereof. The air will thus have to pass through cured to the body A alone, and the base may be made removable, being screwed to the upper part, as shown at t 25, Fig. 1. The button L may be regulated by a thumb-screw Z) at the bottom or by any other convenient arrangement.

hat I claim as my invention, and desire to secure by Letters Patent, is

1. The annular air-reservoir P, in combination with the entry-space T and inwardly-projecting lips o 19, substantially as described, for the purpose of rendering the outer draft sutficiently constantto prevent the smoking of the lamp by any gusts of air or sudden movement to which the lamp may ordinarily be subjected.

2. The fine apertures or meshes n 01, opening into an outer chamber S, in combination with said chamber and with an inner perforated or reticular partition separating said chamber from the inner draft-tube, substantially in the manner and for the purposes herein described.

PRENTICE SARGENT.

Vitncsses:

J. S. BROWN, CLEMT. S. STULL. 

